Adjustable blackboard and table or desk.



'No. 643,73l. Patented Feb. 20, I900.

D. W. PRUSSER 8|. W. W. WATSON. V

ADJUSTABLE BLACKBOARD AND TABLE 0R DESK.

(Application filed Feb. 23, 1899.)

(No Model.)

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UNITED STATES PATENT OFFICE.

DAVID NV. PROSSER AND l/VILLIAM W. \VATSON, OF JAMESTOIVN, NEW YORK.

ADJUSTABLE BLACKBOARD AND TABLE OR DESK.

SPECIFICATION forming part of Letters Patent No. 643,731, dated February 20, 1900. Application filedPebruary 23, 1899. Serial No. 706,630. (No model.)

To aZZ whom it may concern:

Be it known that we, DAVID W. PRossEE and WILLIAM \V. WATSON, citizens of the United States, residing in Jamestown, in the county of Chautauqua and State of New York,

- have invented a new and useful Adjustable Blackboard and Table or Desk, of which the following is a specification.

Our invention relates to improvements in a combined adjustable blackboard and table or desk, the object being to provide a cheap, durable, and convenient adjustable blackboard and desk adapted to the needs of schoolchildren in the lower grades of schoolwork to assist them in their work and in study and recreation at home in which a convenient desk is provided, and the blackboard can easily be turned down back of the desk when not in use and as quickly returned to any desired position for work on the desk-top, and we obtain these results by the construction and arrangement of the parts as shown in the accompanying drawings, in which Figure 1 is a front elevation of desk with blackboard in position for use. Fig. 2 is a side elevation of desk and board in position for use. Fig. 3 is a side elevation of desk with board turned down back. of the desk as when not in use.

Similar letters refer to similar parts in the several views.

A represents the blackboard, and B the desk or table.

0 C are arms which are pivotally attached to the ends of blackboard A at X X, and the other ends of said arms are attached to the ends of rod to form a supporting-frame for blackboard A. Rod E extends the length of desk B under top T and works in slots D D. Notches O O O are out in slots D Dto lock the blackboard A in different positions on the desk-top or down back of the desk, with the upper side of the board extendingabove the desk-top to form a back for top T, as shown in Fig. 3.

The lower edge of blackboard A is locked in position for use on the desk-top by hooks Y Y, which engage hook-eye Z and holds the board firmly in position for either side.

Drawer N, while not necessary for our invention, is a desirable feature to hold erasers, chalk, &c., and the front of drawer N may extend up to the under side of top T, as shown; but the rear part of the drawer cannot extend above the bottom of notches O O 0 since the drawer would conflict with the working of rod E. Shelf M and drawer N strengthen desk B by bracing the sides.

The blackboard is made in any desired shape and is usually prepared for use on both sides. The board is reversed by swinging either side front on pivots X X and when in use is supported at any desired angle of in cline on arms 0 C and rod E by placing said rod in thecorresponding notch, like 0 O 0 and when not in use the board is locked securely in the position shownin Fig. 3 by sliding rod E forward in slots D D to the do sired notch and swinging blackboard A on arms 0 O and pivots X X.

We claim as new- 1. In an adjustable blackboard and desk, a desk having a notched slot in each end, a reversible blackboard which revolves on a supporting-frame, a supporting-frame having a cross-bar which rests in the notches in said slots and holds the blackboard on the desk-top or at the back of the desk, as shown and described.

2. In an adjustable blackboard and desk, the combination of a reversible blackboard A, a frame composed of arms 0, O, and rod E pivotally attached to said board to support the same, a desk or table B having slots D, D, in each end and notches O, O, O, in said slots to receive and hold said rod, as shown and described.

DAVID W. PROSSER. WVM. WV. WATSON. Witnesses:

A. A. ADAMS, F. W. BLAOKMAR. 

